Why Is My WiFi Slow on Only One Device?
Quick answer
If other devices fly on the same Wi-Fi, the internet and the router are fine — the slow device is limiting itself. The usual causes, in order: old Wi-Fi hardware in the device, outdated drivers, power saving putting the radio to sleep, a weak antenna at range, or that device's own background traffic.
First, confirm it's the device
- Test a second device in the same spot — a phone next to the slow laptop, same room, same moment. Run the Wi-Fi speed test on both.
- One slow, one fast → device problem; work down the fixes below.
- Both slow → it's the wireless environment or the connection after all: how to improve Wi-Fi speed and why is my internet so slow.
The fixes, most likely first
- Update the Wi-Fi driver (or the phone's system update). Old drivers mis-handle modern routers: slow speeds, drops, clinging to the wrong band. On Windows, check both Windows Update and the manufacturer's site for the laptop model.
- Turn off Wi-Fi power saving on that device. Laptops especially put the wireless card to sleep between packets; some wake late and drag everything. On Windows: Device Manager → the Wi-Fi adapter's Power Management tab, and the power plan's wireless setting. Keep the laptop plugged in while testing.
- Check how old the device's Wi-Fi is. A laptop with an 802.11n-era card tops out far below modern plan speeds no matter what the router offers — the adapter's spec sheet tells you. A USB Wi-Fi adapter (a small one supporting the current standards) is the cheapest rescue for an otherwise good machine.
- Force the 5 GHz band near the router. If the router broadcasts one combined name, the device may cling to 2.4 GHz and its interference. Split the bands into separate names or check the router app's band steering, then join 5 GHz when close.
- Give it a fair chance on range. Phones and laptops have smaller antennas than the router's. Test the slow device in the same room as the router: if it's fast there and slow two rooms away, distance — not the device — is the story, and a mesh point or better placement is the fix.
- Look at its own traffic. Cloud backups, photo sync, game launchers and updates on that one device quietly eat its whole share. Pause sync and updates on that device, then test again.
- VPNs and security suites. If only this device runs a VPN or traffic-scanning security software, that software is in the path of every megabyte. Toggle it off, test, and see does a VPN slow down your internet.
- Try another browser. If the machine is slow in one browser only, it's the browser's proxy settings or cache, not the connection at all.
Windows laptops specifically
Windows machines collect several of these at once — driver, power saving, background apps, security suites — which is why "the laptop is slow, the phones are fine" is such a common pattern. A fuller walkthrough, including which background apps eat bandwidth: how to speed up internet on a Windows PC.
Slow — or offline?
One device that shows connected but loads nothing at all is a different fault, with different fixes: Wi-Fi connected but no internet. And a single device that keeps dropping is covered in why your internet keeps disconnecting — the device-side items there overlap with fixes 1 and 2 here.
Phones and tablets specifically
On a phone, start with the easy resets: toggle Wi-Fi off and on, then "forget" the network and rejoin it. Check that low-power or battery-saver mode is off while testing — it can limit background activity and Wi-Fi performance. A thick case with a metal plate or magnetic mount can weaken the signal a little, and an old phone simply has an older Wi-Fi radio than a new one. If a phone is slow only in one room, compare it with another phone in the same spot before blaming the device.